Yeah, I'd say expectancy is unitless, value is in something like "utils", and expectancy * value is the expected value. I would put impulsiveness in something l

Yeah, I'd say expectancy is unitless, value is in something like "utils", and expectancy * value is the expected value. I would put impulsiveness in something like amount of "meh" per second (e.g. for each second you have to wait for reward, you feel that amount more "meh" about doing the task). That would give motivation units of utils/meh. Although, I don't think our actual motivation is linearly inversely proportional to delay at all. I wouldn't expect people to feel about 86,000 times more motivated to do a task that rewards you with $10 one second later versus the same task if the $10 took 24 hours to arrive in the mail.